/*! ColReorder 1.5.3
 * ©2010-2020 SpryMedia Ltd - datatables.net/license
 */

/**
 * @summary     ColReorder
 * @description Provide the ability to reorder columns in a DataTable
 * @version     1.5.3
 * @file        dataTables.colReorder.js
 * @author      SpryMedia Ltd (www.sprymedia.co.uk)
 * @contact     www.sprymedia.co.uk/contact
 * @copyright   Copyright 2010-2020 SpryMedia Ltd.
 *
 * This source file is free software, available under the following license:
 *   MIT license - http://datatables.net/license/mit
 *
 * This source file is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the license files for details.
 *
 * For details please refer to: http://www.datatables.net
 */
(function (factory) {
  if (typeof define === 'function' && define.amd) {
    // AMD
    define(['jquery', 'datatables.net'], function ($) {
      return factory($, window, document);
    });
  } else if (typeof exports === 'object') {
    // CommonJS
    module.exports = function (root, $) {
      if (!root) {
        root = window;
      }

      if (!$ || !$.fn.dataTable) {
        $ = require('datatables.net')(root, $).$;
      }

      return factory($, root, root.document);
    };
  } else {
    // Browser
    factory(jQuery, window, document);
  }
}(function ($, window, document, undefined) {
  'use strict';
  var DataTable = $.fn.dataTable;


  /**
   * Switch the key value pairing of an index array to be value key (i.e. the old value is now the
   * key). For example consider [ 2, 0, 1 ] this would be returned as [ 1, 2, 0 ].
   *  @method  fnInvertKeyValues
   *  @param   array aIn Array to switch around
   *  @returns array
   */
  function fnInvertKeyValues(aIn) {
    var aRet = [];
    for (var i = 0, iLen = aIn.length; i < iLen; i++) {
      aRet[aIn[i]] = i;
    }
    return aRet;
  }


  /**
   * Modify an array by switching the position of two elements
   *  @method  fnArraySwitch
   *  @param   array aArray Array to consider, will be modified by reference (i.e. no return)
   *  @param   int iFrom From point
   *  @param   int iTo Insert point
   *  @returns void
   */
  function fnArraySwitch(aArray, iFrom, iTo) {
    var mStore = aArray.splice(iFrom, 1)[0];
    aArray.splice(iTo, 0, mStore);
  }


  /**
   * Switch the positions of nodes in a parent node (note this is specifically designed for
   * table rows). Note this function considers all element nodes under the parent!
   *  @method  fnDomSwitch
   *  @param   string sTag Tag to consider
   *  @param   int iFrom Element to move
   *  @param   int Point to element the element to (before this point), can be null for append
   *  @returns void
   */
  function fnDomSwitch(nParent, iFrom, iTo) {
    var anTags = [];
    for (var i = 0, iLen = nParent.childNodes.length; i < iLen; i++) {
      if (nParent.childNodes[i].nodeType == 1) {
        anTags.push(nParent.childNodes[i]);
      }
    }
    var nStore = anTags[iFrom];

    if (iTo !== null) {
      nParent.insertBefore(nStore, anTags[iTo]);
    } else {
      nParent.appendChild(nStore);
    }
  }


  /**
   * Plug-in for DataTables which will reorder the internal column structure by taking the column
   * from one position (iFrom) and insert it into a given point (iTo).
   *  @method  $.fn.dataTableExt.oApi.fnColReorder
   *  @param   object oSettings DataTables settings object - automatically added by DataTables!
   *  @param   int iFrom Take the column to be repositioned from this point
   *  @param   int iTo and insert it into this point
   *  @param   bool drop Indicate if the reorder is the final one (i.e. a drop)
   *    not a live reorder
   *  @param   bool invalidateRows speeds up processing if false passed
   *  @returns void
   */
  $.fn.dataTableExt.oApi.fnColReorder = function (oSettings, iFrom, iTo, drop, invalidateRows) {
    var i, iLen, j, jLen, jen, iCols = oSettings.aoColumns.length, nTrs, oCol;
    var attrMap = function (obj, prop, mapping) {
      if (!obj[prop] || typeof obj[prop] === 'function') {
        return;
      }

      var a = obj[prop].split('.');
      var num = a.shift();

      if (isNaN(num * 1)) {
        return;
      }

      obj[prop] = mapping[num * 1] + '.' + a.join('.');
    };

    /* Sanity check in the input */
    if (iFrom == iTo) {
      /* Pointless reorder */
      return;
    }

    if (iFrom < 0 || iFrom >= iCols) {
      this.oApi._fnLog(oSettings, 1, "ColReorder 'from' index is out of bounds: " + iFrom);
      return;
    }

    if (iTo < 0 || iTo >= iCols) {
      this.oApi._fnLog(oSettings, 1, "ColReorder 'to' index is out of bounds: " + iTo);
      return;
    }

    /*
     * Calculate the new column array index, so we have a mapping between the old and new
     */
    var aiMapping = [];
    for (i = 0, iLen = iCols; i < iLen; i++) {
      aiMapping[i] = i;
    }
    fnArraySwitch(aiMapping, iFrom, iTo);
    var aiInvertMapping = fnInvertKeyValues(aiMapping);


    /*
     * Convert all internal indexing to the new column order indexes
     */
    /* Sorting */
    for (i = 0, iLen = oSettings.aaSorting.length; i < iLen; i++) {
      oSettings.aaSorting[i][0] = aiInvertMapping[oSettings.aaSorting[i][0]];
    }

    /* Fixed sorting */
    if (oSettings.aaSortingFixed !== null) {
      for (i = 0, iLen = oSettings.aaSortingFixed.length; i < iLen; i++) {
        oSettings.aaSortingFixed[i][0] = aiInvertMapping[oSettings.aaSortingFixed[i][0]];
      }
    }

    /* Data column sorting (the column which the sort for a given column should take place on) */
    for (i = 0, iLen = iCols; i < iLen; i++) {
      oCol = oSettings.aoColumns[i];
      for (j = 0, jLen = oCol.aDataSort.length; j < jLen; j++) {
        oCol.aDataSort[j] = aiInvertMapping[oCol.aDataSort[j]];
      }

      // Update the column indexes
      oCol.idx = aiInvertMapping[oCol.idx];
    }

    // Update 1.10 optimised sort class removal variable
    $.each(oSettings.aLastSort, function (i, val) {
      oSettings.aLastSort[i].src = aiInvertMapping[val.src];
    });

    /* Update the Get and Set functions for each column */
    for (i = 0, iLen = iCols; i < iLen; i++) {
      oCol = oSettings.aoColumns[i];

      if (typeof oCol.mData == 'number') {
        oCol.mData = aiInvertMapping[oCol.mData];
      } else if ($.isPlainObject(oCol.mData)) {
        // HTML5 data sourced
        attrMap(oCol.mData, '_', aiInvertMapping);
        attrMap(oCol.mData, 'filter', aiInvertMapping);
        attrMap(oCol.mData, 'sort', aiInvertMapping);
        attrMap(oCol.mData, 'type', aiInvertMapping);
      }
    }

    /*
     * Move the DOM elements
     */
    if (oSettings.aoColumns[iFrom].bVisible) {
      /* Calculate the current visible index and the point to insert the node before. The insert
       * before needs to take into account that there might not be an element to insert before,
       * in which case it will be null, and an appendChild should be used
       */
      var iVisibleIndex = this.oApi._fnColumnIndexToVisible(oSettings, iFrom);
      var iInsertBeforeIndex = null;

      i = iTo < iFrom ? iTo : iTo + 1;
      while (iInsertBeforeIndex === null && i < iCols) {
        iInsertBeforeIndex = this.oApi._fnColumnIndexToVisible(oSettings, i);
        i++;
      }

      /* Header */
      nTrs = oSettings.nTHead.getElementsByTagName('tr');
      for (i = 0, iLen = nTrs.length; i < iLen; i++) {
        fnDomSwitch(nTrs[i], iVisibleIndex, iInsertBeforeIndex);
      }

      /* Footer */
      if (oSettings.nTFoot !== null) {
        nTrs = oSettings.nTFoot.getElementsByTagName('tr');
        for (i = 0, iLen = nTrs.length; i < iLen; i++) {
          fnDomSwitch(nTrs[i], iVisibleIndex, iInsertBeforeIndex);
        }
      }

      /* Body */
      for (i = 0, iLen = oSettings.aoData.length; i < iLen; i++) {
        if (oSettings.aoData[i].nTr !== null) {
          fnDomSwitch(oSettings.aoData[i].nTr, iVisibleIndex, iInsertBeforeIndex);
        }
      }
    }

    /*
     * Move the internal array elements
     */
    /* Columns */
    fnArraySwitch(oSettings.aoColumns, iFrom, iTo);

    // regenerate the get / set functions
    for (i = 0, iLen = iCols; i < iLen; i++) {
      oSettings.oApi._fnColumnOptions(oSettings, i, {});
    }

    /* Search columns */
    fnArraySwitch(oSettings.aoPreSearchCols, iFrom, iTo);

    /* Array array - internal data anodes cache */
    for (i = 0, iLen = oSettings.aoData.length; i < iLen; i++) {
      var data = oSettings.aoData[i];
      var cells = data.anCells;

      if (cells) {
        fnArraySwitch(cells, iFrom, iTo);

        // Longer term, should this be moved into the DataTables' invalidate
        // methods?
        for (j = 0, jen = cells.length; j < jen; j++) {
          if (cells[j] && cells[j]._DT_CellIndex) {
            cells[j]._DT_CellIndex.column = j;
          }
        }
      }

      // For DOM sourced data, the invalidate will reread the cell into
      // the data array, but for data sources as an array, they need to
      // be flipped
      if (data.src !== 'dom' && Array.isArray(data._aData)) {
        fnArraySwitch(data._aData, iFrom, iTo);
      }
    }

    /* Reposition the header elements in the header layout array */
    for (i = 0, iLen = oSettings.aoHeader.length; i < iLen; i++) {
      fnArraySwitch(oSettings.aoHeader[i], iFrom, iTo);
    }

    if (oSettings.aoFooter !== null) {
      for (i = 0, iLen = oSettings.aoFooter.length; i < iLen; i++) {
        fnArraySwitch(oSettings.aoFooter[i], iFrom, iTo);
      }
    }

    if (invalidateRows || invalidateRows === undefined) {
      $.fn.dataTable.Api(oSettings).rows().invalidate();
    }

    /*
     * Update DataTables' event handlers
     */

    /* Sort listener */
    for (i = 0, iLen = iCols; i < iLen; i++) {
      $(oSettings.aoColumns[i].nTh).off('.DT');
      this.oApi._fnSortAttachListener(oSettings, oSettings.aoColumns[i].nTh, i);
    }


    /* Fire an event so other plug-ins can update */
    $(oSettings.oInstance).trigger('column-reorder.dt', [oSettings, {
      from: iFrom,
      to: iTo,
      mapping: aiInvertMapping,
      drop: drop,

      // Old style parameters for compatibility
      iFrom: iFrom,
      iTo: iTo,
      aiInvertMapping: aiInvertMapping
    }]);
  };

  /**
   * ColReorder provides column visibility control for DataTables
   * @class ColReorder
   * @constructor
   * @param {object} dt DataTables settings object
   * @param {object} opts ColReorder options
   */
  var ColReorder = function (dt, opts) {
    var settings = new $.fn.dataTable.Api(dt).settings()[0];

    // Ensure that we can't initialise on the same table twice
    if (settings._colReorder) {
      return settings._colReorder;
    }

    // Allow the options to be a boolean for defaults
    if (opts === true) {
      opts = {};
    }

    // Convert from camelCase to Hungarian, just as DataTables does
    var camelToHungarian = $.fn.dataTable.camelToHungarian;
    if (camelToHungarian) {
      camelToHungarian(ColReorder.defaults, ColReorder.defaults, true);
      camelToHungarian(ColReorder.defaults, opts || {});
    }


    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Public class variables
     * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

    /**
     * @namespace Settings object which contains customisable information for ColReorder instance
     */
    this.s = {
      /**
       * DataTables settings object
       *  @property dt
       *  @type     Object
       *  @default  null
       */
      "dt": null,

      /**
       * Enable flag
       *  @property dt
       *  @type     Object
       *  @default  null
       */
      "enable": null,

      /**
       * Initialisation object used for this instance
       *  @property init
       *  @type     object
       *  @default  {}
       */
      "init": $.extend(true, {}, ColReorder.defaults, opts),

      /**
       * Number of columns to fix (not allow to be reordered)
       *  @property fixed
       *  @type     int
       *  @default  0
       */
      "fixed": 0,

      /**
       * Number of columns to fix counting from right (not allow to be reordered)
       *  @property fixedRight
       *  @type     int
       *  @default  0
       */
      "fixedRight": 0,

      /**
       * Callback function for once the reorder has been done
       *  @property reorderCallback
       *  @type     function
       *  @default  null
       */
      "reorderCallback": null,

      /**
       * @namespace Information used for the mouse drag
       */
      "mouse": {
        "startX": -1,
        "startY": -1,
        "offsetX": -1,
        "offsetY": -1,
        "target": -1,
        "targetIndex": -1,
        "fromIndex": -1
      },

      /**
       * Information which is used for positioning the insert cusor and knowing where to do the
       * insert. Array of objects with the properties:
       *   x: x-axis position
       *   to: insert point
       *  @property aoTargets
       *  @type     array
       *  @default  []
       */
      "aoTargets": []
    };


    /**
     * @namespace Common and useful DOM elements for the class instance
     */
    this.dom = {
      /**
       * Dragging element (the one the mouse is moving)
       *  @property drag
       *  @type     element
       *  @default  null
       */
      "drag": null,

      /**
       * The insert cursor
       *  @property pointer
       *  @type     element
       *  @default  null
       */
      "pointer": null
    };

    /* Constructor logic */
    this.s.enable = this.s.init.bEnable;
    this.s.dt = settings;
    this.s.dt._colReorder = this;
    this._fnConstruct();

    return this;
  };


  $.extend(ColReorder.prototype, {
    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Public methods
     * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

    /**
     * Enable / disable end user interaction
     */
    fnEnable: function (flag) {
      if (flag === false) {
        return fnDisable();
      }

      this.s.enable = true;
    },

    /**
     * Disable end user interaction
     */
    fnDisable: function () {
      this.s.enable = false;
    },

    /**
     * Reset the column ordering to the original ordering that was detected on
     * start up.
     *  @return {this} Returns `this` for chaining.
     *
     *  @example
     *    // DataTables initialisation with ColReorder
     *    var table = $('#example').dataTable( {
     *        "sDom": 'Rlfrtip'
     *    } );
     *
     *    // Add click event to a button to reset the ordering
     *    $('#resetOrdering').click( function (e) {
     *        e.preventDefault();
     *        $.fn.dataTable.ColReorder( table ).fnReset();
     *    } );
     */
    "fnReset": function () {
      this._fnOrderColumns(this.fnOrder());

      return this;
    },

    /**
     * `Deprecated` - Get the current order of the columns, as an array.
     *  @return {array} Array of column identifiers
     *  @deprecated `fnOrder` should be used in preference to this method.
     *      `fnOrder` acts as a getter/setter.
     */
    "fnGetCurrentOrder": function () {
      return this.fnOrder();
    },

    /**
     * Get the current order of the columns, as an array. Note that the values
     * given in the array are unique identifiers for each column. Currently
     * these are the original ordering of the columns that was detected on
     * start up, but this could potentially change in future.
     *  @return {array} Array of column identifiers
     *
     *  @example
     *    // Get column ordering for the table
     *    var order = $.fn.dataTable.ColReorder( dataTable ).fnOrder();
     *//**
     * Set the order of the columns, from the positions identified in the
     * ordering array given. Note that ColReorder takes a brute force approach
     * to reordering, so it is possible multiple reordering events will occur
     * before the final order is settled upon.
     *  @param {array} [set] Array of column identifiers in the new order. Note
     *    that every column must be included, uniquely, in this array.
     *  @return {this} Returns `this` for chaining.
     *
     *  @example
     *    // Swap the first and second columns
     *    $.fn.dataTable.ColReorder( dataTable ).fnOrder( [1, 0, 2, 3, 4] );
     *
     *  @example
     *    // Move the first column to the end for the table `#example`
     *    var curr = $.fn.dataTable.ColReorder( '#example' ).fnOrder();
     *    var first = curr.shift();
     *    curr.push( first );
     *    $.fn.dataTable.ColReorder( '#example' ).fnOrder( curr );
     *
     *  @example
     *    // Reverse the table's order
     *    $.fn.dataTable.ColReorder( '#example' ).fnOrder(
     *      $.fn.dataTable.ColReorder( '#example' ).fnOrder().reverse()
     *    );
     */
    "fnOrder": function (set, original) {
      var a = [], i, ien, j, jen;
      var columns = this.s.dt.aoColumns;

      if (set === undefined) {
        for (i = 0, ien = columns.length; i < ien; i++) {
          a.push(columns[i]._ColReorder_iOrigCol);
        }

        return a;
      }

      // The order given is based on the original indexes, rather than the
      // existing ones, so we need to translate from the original to current
      // before then doing the order
      if (original) {
        var order = this.fnOrder();

        for (i = 0, ien = set.length; i < ien; i++) {
          a.push($.inArray(set[i], order));
        }

        set = a;
      }

      this._fnOrderColumns(fnInvertKeyValues(set));

      return this;
    },


    /**
     * Convert from the original column index, to the original
     *
     * @param  {int|array} idx Index(es) to convert
     * @param  {string} dir Transpose direction - `fromOriginal` / `toCurrent`
     *   or `'toOriginal` / `fromCurrent`
     * @return {int|array}     Converted values
     */
    fnTranspose: function (idx, dir) {
      if (!dir) {
        dir = 'toCurrent';
      }

      var order = this.fnOrder();
      var columns = this.s.dt.aoColumns;

      if (dir === 'toCurrent') {
        // Given an original index, want the current
        return !Array.isArray(idx) ?
          $.inArray(idx, order) :
          $.map(idx, function (index) {
            return $.inArray(index, order);
          });
      } else {
        // Given a current index, want the original
        return !Array.isArray(idx) ?
          columns[idx]._ColReorder_iOrigCol :
          $.map(idx, function (index) {
            return columns[index]._ColReorder_iOrigCol;
          });
      }
    },


    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Private methods (they are of course public in JS, but recommended as private)
     * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

    /**
     * Constructor logic
     *  @method  _fnConstruct
     *  @returns void
     *  @private
     */
    "_fnConstruct": function () {
      var that = this;
      var iLen = this.s.dt.aoColumns.length;
      var table = this.s.dt.nTable;
      var i;

      /* Columns discounted from reordering - counting left to right */
      if (this.s.init.iFixedColumns) {
        this.s.fixed = this.s.init.iFixedColumns;
      }

      if (this.s.init.iFixedColumnsLeft) {
        this.s.fixed = this.s.init.iFixedColumnsLeft;
      }

      /* Columns discounted from reordering - counting right to left */
      this.s.fixedRight = this.s.init.iFixedColumnsRight ?
        this.s.init.iFixedColumnsRight :
        0;

      /* Drop callback initialisation option */
      if (this.s.init.fnReorderCallback) {
        this.s.reorderCallback = this.s.init.fnReorderCallback;
      }

      /* Add event handlers for the drag and drop, and also mark the original column order */
      for (i = 0; i < iLen; i++) {
        if (i > this.s.fixed - 1 && i < iLen - this.s.fixedRight) {
          this._fnMouseListener(i, this.s.dt.aoColumns[i].nTh);
        }

        /* Mark the original column order for later reference */
        this.s.dt.aoColumns[i]._ColReorder_iOrigCol = i;
      }

      /* State saving */
      this.s.dt.oApi._fnCallbackReg(this.s.dt, 'aoStateSaveParams', function (oS, oData) {
        that._fnStateSave.call(that, oData);
      }, "ColReorder_State");

      /* An initial column order has been specified */
      var aiOrder = null;
      if (this.s.init.aiOrder) {
        aiOrder = this.s.init.aiOrder.slice();
      }

      /* State loading, overrides the column order given */
      if (this.s.dt.oLoadedState && typeof this.s.dt.oLoadedState.ColReorder != 'undefined' &&
        this.s.dt.oLoadedState.ColReorder.length == this.s.dt.aoColumns.length) {
        aiOrder = this.s.dt.oLoadedState.ColReorder;
      }

      /* If we have an order to apply - do so */
      if (aiOrder) {
        /* We might be called during or after the DataTables initialisation. If before, then we need
         * to wait until the draw is done, if after, then do what we need to do right away
         */
        if (!that.s.dt._bInitComplete) {
          var bDone = false;
          $(table).on('draw.dt.colReorder', function () {
            if (!that.s.dt._bInitComplete && !bDone) {
              bDone = true;
              var resort = fnInvertKeyValues(aiOrder);
              that._fnOrderColumns.call(that, resort);
            }
          });
        } else {
          var resort = fnInvertKeyValues(aiOrder);
          that._fnOrderColumns.call(that, resort);
        }
      } else {
        this._fnSetColumnIndexes();
      }

      // Destroy clean up
      $(table).on('destroy.dt.colReorder', function () {
        $(table).off('destroy.dt.colReorder draw.dt.colReorder');

        $.each(that.s.dt.aoColumns, function (i, column) {
          $(column.nTh).off('.ColReorder');
          $(column.nTh).removeAttr('data-column-index');
        });

        that.s.dt._colReorder = null;
        that.s = null;
      });
    },


    /**
     * Set the column order from an array
     *  @method  _fnOrderColumns
     *  @param   array a An array of integers which dictate the column order that should be applied
     *  @returns void
     *  @private
     */
    "_fnOrderColumns": function (a) {
      var changed = false;

      if (a.length != this.s.dt.aoColumns.length) {
        this.s.dt.oInstance.oApi._fnLog(this.s.dt, 1, "ColReorder - array reorder does not " +
          "match known number of columns. Skipping.");
        return;
      }

      for (var i = 0, iLen = a.length; i < iLen; i++) {
        var currIndex = $.inArray(i, a);
        if (i != currIndex) {
          /* Reorder our switching array */
          fnArraySwitch(a, currIndex, i);

          /* Do the column reorder in the table */
          this.s.dt.oInstance.fnColReorder(currIndex, i, true, false);

          changed = true;
        }
      }

      this._fnSetColumnIndexes();

      // Has anything actually changed? If not, then nothing else to do
      if (!changed) {
        return;
      }

      $.fn.dataTable.Api(this.s.dt).rows().invalidate();

      /* When scrolling we need to recalculate the column sizes to allow for the shift */
      if (this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "") {
        this.s.dt.oInstance.fnAdjustColumnSizing(false);
      }

      /* Save the state */
      this.s.dt.oInstance.oApi._fnSaveState(this.s.dt);

      if (this.s.reorderCallback !== null) {
        this.s.reorderCallback.call(this);
      }
    },


    /**
     * Because we change the indexes of columns in the table, relative to their starting point
     * we need to reorder the state columns to what they are at the starting point so we can
     * then rearrange them again on state load!
     *  @method  _fnStateSave
     *  @param   object oState DataTables state
     *  @returns string JSON encoded cookie string for DataTables
     *  @private
     */
    "_fnStateSave": function (oState) {
      var i, iLen, aCopy, iOrigColumn;
      var oSettings = this.s.dt;
      var columns = oSettings.aoColumns;

      oState.ColReorder = [];

      /* Sorting */
      if (oState.aaSorting) {
        // 1.10.0-
        for (i = 0; i < oState.aaSorting.length; i++) {
          oState.aaSorting[i][0] = columns[oState.aaSorting[i][0]]._ColReorder_iOrigCol;
        }

        var aSearchCopy = $.extend(true, [], oState.aoSearchCols);

        for (i = 0, iLen = columns.length; i < iLen; i++) {
          iOrigColumn = columns[i]._ColReorder_iOrigCol;

          /* Column filter */
          oState.aoSearchCols[iOrigColumn] = aSearchCopy[i];

          /* Visibility */
          oState.abVisCols[iOrigColumn] = columns[i].bVisible;

          /* Column reordering */
          oState.ColReorder.push(iOrigColumn);
        }
      } else if (oState.order) {
        // 1.10.1+
        for (i = 0; i < oState.order.length; i++) {
          oState.order[i][0] = columns[oState.order[i][0]]._ColReorder_iOrigCol;
        }

        var stateColumnsCopy = $.extend(true, [], oState.columns);

        for (i = 0, iLen = columns.length; i < iLen; i++) {
          iOrigColumn = columns[i]._ColReorder_iOrigCol;

          /* Columns */
          oState.columns[iOrigColumn] = stateColumnsCopy[i];

          /* Column reordering */
          oState.ColReorder.push(iOrigColumn);
        }
      }
    },


    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Mouse drop and drag
     */

    /**
     * Add a mouse down listener to a particluar TH element
     *  @method  _fnMouseListener
     *  @param   int i Column index
     *  @param   element nTh TH element clicked on
     *  @returns void
     *  @private
     */
    "_fnMouseListener": function (i, nTh) {
      var that = this;
      $(nTh)
        .on('mousedown.ColReorder', function (e) {
          if (that.s.enable && e.which === 1) {
            that._fnMouseDown.call(that, e, nTh);
          }
        })
        .on('touchstart.ColReorder', function (e) {
          if (that.s.enable) {
            that._fnMouseDown.call(that, e, nTh);
          }
        });
    },


    /**
     * Mouse down on a TH element in the table header
     *  @method  _fnMouseDown
     *  @param   event e Mouse event
     *  @param   element nTh TH element to be dragged
     *  @returns void
     *  @private
     */
    "_fnMouseDown": function (e, nTh) {
      var that = this;

      /* Store information about the mouse position */
      var target = $(e.target).closest('th, td');
      var offset = target.offset();
      var idx = parseInt($(nTh).attr('data-column-index'), 10);

      if (idx === undefined) {
        return;
      }

      this.s.mouse.startX = this._fnCursorPosition(e, 'pageX');
      this.s.mouse.startY = this._fnCursorPosition(e, 'pageY');
      this.s.mouse.offsetX = this._fnCursorPosition(e, 'pageX') - offset.left;
      this.s.mouse.offsetY = this._fnCursorPosition(e, 'pageY') - offset.top;
      this.s.mouse.target = this.s.dt.aoColumns[idx].nTh;//target[0];
      this.s.mouse.targetIndex = idx;
      this.s.mouse.fromIndex = idx;

      this._fnRegions();

      /* Add event handlers to the document */
      $(document)
        .on('mousemove.ColReorder touchmove.ColReorder', function (e) {
          that._fnMouseMove.call(that, e);
        })
        .on('mouseup.ColReorder touchend.ColReorder', function (e) {
          that._fnMouseUp.call(that, e);
        });
    },


    /**
     * Deal with a mouse move event while dragging a node
     *  @method  _fnMouseMove
     *  @param   event e Mouse event
     *  @returns void
     *  @private
     */
    "_fnMouseMove": function (e) {
      var that = this;

      if (this.dom.drag === null) {
        /* Only create the drag element if the mouse has moved a specific distance from the start
         * point - this allows the user to make small mouse movements when sorting and not have a
         * possibly confusing drag element showing up
         */
        if (Math.pow(
          Math.pow(this._fnCursorPosition(e, 'pageX') - this.s.mouse.startX, 2) +
          Math.pow(this._fnCursorPosition(e, 'pageY') - this.s.mouse.startY, 2), 0.5) < 5) {
          return;
        }
        this._fnCreateDragNode();
      }

      /* Position the element - we respect where in the element the click occured */
      this.dom.drag.css({
        left: this._fnCursorPosition(e, 'pageX') - this.s.mouse.offsetX,
        top: this._fnCursorPosition(e, 'pageY') - this.s.mouse.offsetY
      });

      /* Based on the current mouse position, calculate where the insert should go */
      var target;
      var lastToIndex = this.s.mouse.toIndex;
      var cursorXPosiotion = this._fnCursorPosition(e, 'pageX');
      var targetsPrev = function (i) {
        while (i >= 0) {
          i--;

          if (i <= 0) {
            return null;
          }

          if (that.s.aoTargets[i + 1].x !== that.s.aoTargets[i].x) {
            return that.s.aoTargets[i];
          }
        }
      };
      var firstNotHidden = function () {
        for (var i = 0; i < that.s.aoTargets.length - 1; i++) {
          if (that.s.aoTargets[i].x !== that.s.aoTargets[i + 1].x) {
            return that.s.aoTargets[i];
          }
        }
      };
      var lastNotHidden = function () {
        for (var i = that.s.aoTargets.length - 1; i > 0; i--) {
          if (that.s.aoTargets[i].x !== that.s.aoTargets[i - 1].x) {
            return that.s.aoTargets[i];
          }
        }
      };

      for (var i = 1; i < this.s.aoTargets.length; i++) {
        var prevTarget = targetsPrev(i);
        if (!prevTarget) {
          prevTarget = firstNotHidden();
        }

        var prevTargetMiddle = prevTarget.x + (this.s.aoTargets[i].x - prevTarget.x) / 2;

        if (this._fnIsLtr()) {
          if (cursorXPosiotion < prevTargetMiddle) {
            target = prevTarget;
            break;
          }
        } else {
          if (cursorXPosiotion > prevTargetMiddle) {
            target = prevTarget;
            break;
          }
        }
      }

      if (target) {
        this.dom.pointer.css('left', target.x);
        this.s.mouse.toIndex = target.to;
      } else {
        // The insert element wasn't positioned in the array (less than
        // operator), so we put it at the end
        this.dom.pointer.css('left', lastNotHidden().x);
        this.s.mouse.toIndex = lastNotHidden().to;
      }

      // Perform reordering if realtime updating is on and the column has moved
      if (this.s.init.bRealtime && lastToIndex !== this.s.mouse.toIndex) {
        this.s.dt.oInstance.fnColReorder(this.s.mouse.fromIndex, this.s.mouse.toIndex);
        this.s.mouse.fromIndex = this.s.mouse.toIndex;

        // Not great for performance, but required to keep everything in alignment
        if (this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "") {
          this.s.dt.oInstance.fnAdjustColumnSizing(false);
        }

        this._fnRegions();
      }
    },


    /**
     * Finish off the mouse drag and insert the column where needed
     *  @method  _fnMouseUp
     *  @param   event e Mouse event
     *  @returns void
     *  @private
     */
    "_fnMouseUp": function (e) {
      var that = this;

      $(document).off('.ColReorder');

      if (this.dom.drag !== null) {
        /* Remove the guide elements */
        this.dom.drag.remove();
        this.dom.pointer.remove();
        this.dom.drag = null;
        this.dom.pointer = null;

        /* Actually do the reorder */
        this.s.dt.oInstance.fnColReorder(this.s.mouse.fromIndex, this.s.mouse.toIndex, true);
        this._fnSetColumnIndexes();

        /* When scrolling we need to recalculate the column sizes to allow for the shift */
        if (this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "") {
          this.s.dt.oInstance.fnAdjustColumnSizing(false);
        }

        /* Save the state */
        this.s.dt.oInstance.oApi._fnSaveState(this.s.dt);

        if (this.s.reorderCallback !== null) {
          this.s.reorderCallback.call(this);
        }
      }
    },


    /**
     * Calculate a cached array with the points of the column inserts, and the
     * 'to' points
     *  @method  _fnRegions
     *  @returns void
     *  @private
     */
    "_fnRegions": function () {
      var aoColumns = this.s.dt.aoColumns;
      var isLTR = this._fnIsLtr();
      this.s.aoTargets.splice(0, this.s.aoTargets.length);
      var lastBound = $(this.s.dt.nTable).offset().left;

      var aoColumnBounds = [];
      $.each(aoColumns, function (i, column) {
        if (column.bVisible && column.nTh.style.display !== 'none') {
          var nth = $(column.nTh);
          var bound = nth.offset().left;

          if (isLTR) {
            bound += nth.outerWidth();
          }

          aoColumnBounds.push({
            index: i,
            bound: bound
          });

          lastBound = bound;
        } else {
          aoColumnBounds.push({
            index: i,
            bound: lastBound
          });
        }
      });

      var firstColumn = aoColumnBounds[0];
      var firstColumnWidth = $(aoColumns[firstColumn.index].nTh).outerWidth();

      this.s.aoTargets.push({
        to: 0,
        x: firstColumn.bound - firstColumnWidth
      });

      for (var i = 0; i < aoColumnBounds.length; i++) {
        var columnBound = aoColumnBounds[i];
        var iToPoint = columnBound.index;

        /* For the column / header in question, we want it's position to remain the same if the
        * position is just to it's immediate left or right, so we only increment the counter for
        * other columns
        */
        if (columnBound.index < this.s.mouse.fromIndex) {
          iToPoint++;
        }

        this.s.aoTargets.push({
          to: iToPoint,
          x: columnBound.bound
        });
      }

      /* Disallow columns for being reordered by drag and drop, counting right to left */
      if (this.s.fixedRight !== 0) {
        this.s.aoTargets.splice(this.s.aoTargets.length - this.s.fixedRight);
      }

      /* Disallow columns for being reordered by drag and drop, counting left to right */
      if (this.s.fixed !== 0) {
        this.s.aoTargets.splice(0, this.s.fixed);
      }
    },


    /**
     * Copy the TH element that is being drags so the user has the idea that they are actually
     * moving it around the page.
     *  @method  _fnCreateDragNode
     *  @returns void
     *  @private
     */
    "_fnCreateDragNode": function () {
      var scrolling = this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "";

      var origCell = this.s.dt.aoColumns[this.s.mouse.targetIndex].nTh;
      var origTr = origCell.parentNode;
      var origThead = origTr.parentNode;
      var origTable = origThead.parentNode;
      var cloneCell = $(origCell).clone();

      // This is a slightly odd combination of jQuery and DOM, but it is the
      // fastest and least resource intensive way I could think of cloning
      // the table with just a single header cell in it.
      this.dom.drag = $(origTable.cloneNode(false))
        .addClass('DTCR_clonedTable')
        .append(
          $(origThead.cloneNode(false)).append(
            $(origTr.cloneNode(false)).append(
              cloneCell[0]
            )
          )
        )
        .css({
          position: 'absolute',
          top: 0,
          left: 0,
          width: $(origCell).outerWidth(),
          height: $(origCell).outerHeight()
        })
        .appendTo('body');

      this.dom.pointer = $('<div></div>')
        .addClass('DTCR_pointer')
        .css({
          position: 'absolute',
          top: scrolling ?
            $('div.dataTables_scroll', this.s.dt.nTableWrapper).offset().top :
            $(this.s.dt.nTable).offset().top,
          height: scrolling ?
            $('div.dataTables_scroll', this.s.dt.nTableWrapper).height() :
            $(this.s.dt.nTable).height()
        })
        .appendTo('body');
    },


    /**
     * Add a data attribute to the column headers, so we know the index of
     * the row to be reordered. This allows fast detection of the index, and
     * for this plug-in to work with FixedHeader which clones the nodes.
     *  @private
     */
    "_fnSetColumnIndexes": function () {
      $.each(this.s.dt.aoColumns, function (i, column) {
        $(column.nTh).attr('data-column-index', i);
      });
    },


    /**
     * Get cursor position regardless of mouse or touch input
     * @param  {Event}  e    jQuery Event
     * @param  {string} prop Property to get
     * @return {number}      Value
     */
    _fnCursorPosition: function (e, prop) {
      if (e.type.indexOf('touch') !== -1) {
        return e.originalEvent.touches[0][prop];
      }
      return e[prop];
    },

    _fnIsLtr: function () {
      return $(this.s.dt.nTable).css('direction') !== "rtl";
    }
  });


  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * Static parameters
   * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */


  /**
   * ColReorder default settings for initialisation
   *  @namespace
   *  @static
   */
  ColReorder.defaults = {
    /**
     * Predefined ordering for the columns that will be applied automatically
     * on initialisation. If not specified then the order that the columns are
     * found to be in the HTML is the order used.
     *  @type array
     *  @default null
     *  @static
     */
    aiOrder: null,

    /**
     * ColReorder enable on initialisation
     *  @type boolean
     *  @default true
     *  @static
     */
    bEnable: true,

    /**
     * Redraw the table's column ordering as the end user draws the column
     * (`true`) or wait until the mouse is released (`false` - default). Note
     * that this will perform a redraw on each reordering, which involves an
     * Ajax request each time if you are using server-side processing in
     * DataTables.
     *  @type boolean
     *  @default false
     *  @static
     */
    bRealtime: true,

    /**
     * Indicate how many columns should be fixed in position (counting from the
     * left). This will typically be 1 if used, but can be as high as you like.
     *  @type int
     *  @default 0
     *  @static
     */
    iFixedColumnsLeft: 0,

    /**
     * As `iFixedColumnsRight` but counting from the right.
     *  @type int
     *  @default 0
     *  @static
     */
    iFixedColumnsRight: 0,

    /**
     * Callback function that is fired when columns are reordered. The `column-
     * reorder` event is preferred over this callback
     *  @type function():void
     *  @default null
     *  @static
     */
    fnReorderCallback: null
  };


  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * Constants
   * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

  /**
   * ColReorder version
   *  @constant  version
   *  @type      String
   *  @default   As code
   */
  ColReorder.version = "1.5.3";


  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * DataTables interfaces
   * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

// Expose
  $.fn.dataTable.ColReorder = ColReorder;
  $.fn.DataTable.ColReorder = ColReorder;


// Register a new feature with DataTables
  if (typeof $.fn.dataTable == "function" &&
    typeof $.fn.dataTableExt.fnVersionCheck == "function" &&
    $.fn.dataTableExt.fnVersionCheck('1.10.8')) {
    $.fn.dataTableExt.aoFeatures.push({
      "fnInit": function (settings) {
        var table = settings.oInstance;

        if (!settings._colReorder) {
          var dtInit = settings.oInit;
          var opts = dtInit.colReorder || dtInit.oColReorder || {};

          new ColReorder(settings, opts);
        } else {
          table.oApi._fnLog(settings, 1, "ColReorder attempted to initialise twice. Ignoring second");
        }

        return null; /* No node for DataTables to insert */
      },
      "cFeature": "R",
      "sFeature": "ColReorder"
    });
  } else {
    alert("Warning: ColReorder requires DataTables 1.10.8 or greater - www.datatables.net/download");
  }


// Attach a listener to the document which listens for DataTables initialisation
// events so we can automatically initialise
  $(document).on('preInit.dt.colReorder', function (e, settings) {
    if (e.namespace !== 'dt') {
      return;
    }

    var init = settings.oInit.colReorder;
    var defaults = DataTable.defaults.colReorder;

    if (init || defaults) {
      var opts = $.extend({}, init, defaults);

      if (init !== false) {
        new ColReorder(settings, opts);
      }
    }
  });


// API augmentation
  $.fn.dataTable.Api.register('colReorder.reset()', function () {
    return this.iterator('table', function (ctx) {
      ctx._colReorder.fnReset();
    });
  });

  $.fn.dataTable.Api.register('colReorder.order()', function (set, original) {
    if (set) {
      return this.iterator('table', function (ctx) {
        ctx._colReorder.fnOrder(set, original);
      });
    }

    return this.context.length ?
      this.context[0]._colReorder.fnOrder() :
      null;
  });

  $.fn.dataTable.Api.register('colReorder.transpose()', function (idx, dir) {
    return this.context.length && this.context[0]._colReorder ?
      this.context[0]._colReorder.fnTranspose(idx, dir) :
      idx;
  });

  $.fn.dataTable.Api.register('colReorder.move()', function (from, to, drop, invalidateRows) {
    if (this.context.length) {
      this.context[0]._colReorder.s.dt.oInstance.fnColReorder(from, to, drop, invalidateRows);
      this.context[0]._colReorder._fnSetColumnIndexes();
    }
    return this;
  });

  $.fn.dataTable.Api.register('colReorder.enable()', function (flag) {
    return this.iterator('table', function (ctx) {
      if (ctx._colReorder) {
        ctx._colReorder.fnEnable(flag);
      }
    });
  });

  $.fn.dataTable.Api.register('colReorder.disable()', function () {
    return this.iterator('table', function (ctx) {
      if (ctx._colReorder) {
        ctx._colReorder.fnDisable();
      }
    });
  });


  return ColReorder;
}));
